1 /* 2 * S390 CCW boot loader 3 * 4 * Copyright (c) 2013 Alexander Graf <agraf@suse.de> 5 * 6 * This work is licensed under the terms of the GNU GPL, version 2 or (at 7 * your option) any later version. See the COPYING file in the top-level 8 * directory. 9 */ 10 11 #ifndef S390_CCW_H 12 #define S390_CCW_H 13 14 /* #define DEBUG */ 15 16 typedef unsigned char u8; 17 typedef unsigned short u16; 18 typedef unsigned int u32; 19 typedef unsigned long long u64; 20 typedef unsigned long ulong; 21 typedef long size_t; 22 typedef int bool; 23 typedef unsigned char uint8_t; 24 typedef unsigned short uint16_t; 25 typedef unsigned int uint32_t; 26 typedef unsigned long long uint64_t; 27 typedef unsigned char __u8; 28 typedef unsigned short __u16; 29 typedef unsigned int __u32; 30 typedef unsigned long long __u64; 31 32 #define true 1 33 #define false 0 34 #define PAGE_SIZE 4096 35 36 #ifndef EIO 37 #define EIO 1 38 #endif 39 #ifndef EBUSY 40 #define EBUSY 2 41 #endif 42 #ifndef NULL 43 #define NULL 0 44 #endif 45 46 #include "cio.h" 47 48 /* start.s */ 49 void disabled_wait(void); 50 51 /* main.c */ 52 void virtio_panic(const char *string); 53 void write_subsystem_identification(void); 54 extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE))); 55 extern uint64_t boot_value; 56 57 /* sclp-ascii.c */ 58 void sclp_print(const char *string); 59 void sclp_setup(void); 60 61 /* virtio.c */ 62 unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2, 63 ulong subchan_id, void *load_addr); 64 bool virtio_is_blk(struct subchannel_id schid); 65 void virtio_setup_block(struct subchannel_id schid); 66 int virtio_read(ulong sector, void *load_addr); 67 int enable_mss_facility(void); 68 69 /* bootmap.c */ 70 void zipl_load(void); 71 72 static inline void *memset(void *s, int c, size_t n) 73 { 74 int i; 75 unsigned char *p = s; 76 77 for (i = 0; i < n; i++) { 78 p[i] = c; 79 } 80 81 return s; 82 } 83 84 static inline void fill_hex(char *out, unsigned char val) 85 { 86 const char hex[] = "0123456789abcdef"; 87 88 out[0] = hex[(val >> 4) & 0xf]; 89 out[1] = hex[val & 0xf]; 90 } 91 92 static inline void fill_hex_val(char *out, void *ptr, unsigned size) 93 { 94 unsigned char *value = ptr; 95 unsigned int i; 96 97 for (i = 0; i < size; i++) { 98 fill_hex(&out[i*2], value[i]); 99 } 100 } 101 102 static inline void print_int(const char *desc, u64 addr) 103 { 104 char out[] = ": 0xffffffffffffffff\n"; 105 106 fill_hex_val(&out[4], &addr, sizeof(addr)); 107 108 sclp_print(desc); 109 sclp_print(out); 110 } 111 112 static inline void debug_print_int(const char *desc, u64 addr) 113 { 114 #ifdef DEBUG 115 print_int(desc, addr); 116 #endif 117 } 118 119 static inline void debug_print_addr(const char *desc, void *p) 120 { 121 #ifdef DEBUG 122 debug_print_int(desc, (unsigned int)(unsigned long)p); 123 #endif 124 } 125 126 /*********************************************** 127 * Hypercall functions * 128 ***********************************************/ 129 130 #define KVM_S390_VIRTIO_NOTIFY 0 131 #define KVM_S390_VIRTIO_RESET 1 132 #define KVM_S390_VIRTIO_SET_STATUS 2 133 #define KVM_S390_VIRTIO_CCW_NOTIFY 3 134 135 static inline void yield(void) 136 { 137 asm volatile ("diag 0,0,0x44" 138 : : 139 : "memory", "cc"); 140 } 141 142 #define MAX_SECTOR_SIZE 4096 143 144 #endif /* S390_CCW_H */ 145